anonymous
  • anonymous
2x+7y=-3 -9x+y=46
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
too many equal signs
anonymous
  • anonymous
oh my fault i see \[2x+7y=-3\] \[-9x+y=46\] sorry
anonymous
  • anonymous
you want elimination or substitution ?

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anonymous
  • anonymous
Substitution
anonymous
  • anonymous
then solve second equation for y, because it is easiest \[-9x+y=46\] \[y=9x+46\] and substitute into first equation
anonymous
  • anonymous
2x+7y=-3 (*9) -----> 18x+63y=-27 -9x+y=46 (*2) -----> -18x+2y=92 <=> 65y=65 <=>y=1
anonymous
  • anonymous
2x+7*1=-3 => 2x=-10 => x=-5
anonymous
  • anonymous
You are welcome :p
anonymous
  • anonymous
\[2x+7y=-3\] \[2x+7(9x+46)=-3\] \[65x+322=-3\] \[65x=-325\] \[x=-5\]
anonymous
  • anonymous
the find y by substitution. Alexis got right answer using elimination. doesn't matter which you use
anonymous
  • anonymous
We are both great ^^
anonymous
  • anonymous
Yes, You both are. I just wish I could understand this better... still confused :/
anonymous
  • anonymous
what would an ordered pair be?
anonymous
  • anonymous
Just write what I am writing and if you still have any questions tell me.

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